Tobias Nyholm

This plugin is far from fancy. I created this because I could not stand the big complex adsense plugins that 
exists today. This one is small, simple and does the work. It gives you six textboxes where you can write anyting, like ad-codes. 
Then you can display the contents of such box with a widget, a function call och just type <code>[adsense_id="1"]</code> 
in the editor. For more information see installation page or the 
<a href="http://www.webfish.se/wp/plugins/simple-adsense" title="Webfish - WordPress plugin" rel="nofollow ugc">Webfish</a> homepage.

Simple Adsense

Gives you the possiblitity to add your ad-code anywhere. This is a simple plugin compared to those other adsense managers.

gvanto

This powerful plugin allows you to insert HTML/Javascript code into your WordPress post’s content in a variety of different ways.
Using this plugin, you can specify pre-defined HTML code to be displayed at the top and bottom of all your posts, saving you valuable time. Merge fields let you pre-define HTML/Javascript that you can use anywhere in your post. For example, using [my_twitter] you can include an HTML link to your twitter account, anywhere in your WordPress post.
More more info and screenshots, please see: <a href="http://twoggle.com/wordpress-plugins/content-enhancer" rel="nofollow ugc">Content Enhancer</a> homepage.

Content Enhancer

This plugin allows you to insert html/javascript code into your post's content in a variety of different ways.

Simple Adsense vs Content Enhancer